The applicable scenarios of different types of diaphragm valves are as follows:

1. Sanitary Diaphragm Valve
Pharmaceutical industry: used to transport liquid medicine, water for injection, etc. to ensure the purity and quality of medicines.
Food processing: handle milk, juice, syrup, etc. to prevent product contamination.
Beverage industry: used in the processing and filling of carbonated beverages, beer, etc. to ensure the hygiene and safety of beverages.
Biotechnology: handle sensitive biological media such as vaccines and biological drugs.
Cosmetic manufacturing: used for raw material transportation in the manufacturing process to ensure the hygiene standards of cosmetics.
2. Weir diaphragm valve
Low pressure and clean applications: with a smooth contour valve body, it reduces the possibility of fluid retention and is often used in situations where lower pressure drop and larger flow area are required, such as industrial water treatment, food and beverage processing, etc.
3. Straight-through diaphragm valve (full-bore diaphragm valve)
Smooth flow and handling of viscous or particulate fluids: It can provide virtually unimpeded flow when opened, and is suitable for occasions with high solid content and highly abrasive media, such as mining, manufacturing and processing of wood pulp, paper, particles, gypsum, cement, etc.

4. Angle diaphragm valve
Change flow direction: The structure is compact and easy to install in space-constrained environments. It is often used in industries such as chemical processing, pharmaceuticals and water treatment.

5. Direct-flow diaphragm valve
Continuous flow of media: Especially in high-pressure and high-temperature applications, it can withstand high working pressures and temperatures, and is suitable for the fields of petroleum, chemical industry and energy.

6. Sanitary clamp diaphragm valve
Industrial automation system: It is suitable for flow regulation of strong acids, strong alkalis, highly corrosive, high-viscosity, particulate-containing, fiber-containing, toxic and non-contaminated media.

7. Lined diaphragm valve
Strong anti-corrosion occasions: It is widely used in the fields of water treatment in petrochemical, power chemistry, food, papermaking, steel, mining and other processing industries.
VIII. Vacuum diaphragm valve
Vacuum environment: widely used in vacuum, dairy products, wine industry, bioengineering, food, pharmaceuticals, beverages, cosmetics and chemical industries.

In summary, different types of diaphragm valves are suitable for different industries and scenarios due to their structural characteristics and performance differences. When choosing a diaphragm valve, comprehensive consideration should be given to the specific application requirements and working environment.